Mark Harmon has always been one of the most good-looking actors in Hollywood and this stays true regardless of how old he is. Harmon was not always as keen about acting as he is now. He had actually started his career in business before he decided to make the switch. Given that he came from a famous family, with a football star dad and an actress as a mom, the change was not too difficult. We know him best for his roles as a detective, especially when he played Special Agent Jethro Gibbs in NCIS and Special Agent Simon Donovan in The West Wing.
